12 month old sleep

Pretty sure my 12 month old is going through a sleep regression...we’ve managed to breeze through the previous ones, but this one is pretty hard. He’s also throwing his loveys out of his crib and then just stands up and screams. I’ll usually pick them up ONCE if he’s been crying for more than 15 mins, but id like to stick to his routine and keep up with sleep training. He’s slept through the night entirely since he was 5 months old- still does now, but he cries for sometimes 2 hours before he falls asleep. I’ve tried adjusting naps, dropping naps, adjusting bedtime and wake time. I’ve tried everything I can think of. Will he every stop throwing his loveys? Will he ever just fall asleep again like he used to? 😖😭😭😭